Locomotive valve-gear



No. 621,328. Patented Mar. 28, I899. L. A. LANG.

LUCOMOTIVE VALVE GEAR.

(Applicatibn filed Nov. 25, 1898.)

Witnesses Inventor M-$. 5Le.0Lu v. WWW,$LL 4 Attorney NrrE TA PATENT Finch,

LINCOLN A. LANG, OF YULE, NORTH DAKOTA, ASSIGNOR OF ONE-HALF TO EDWARD FREEMAN WALSH, OF ST. PAUL, MINNESOTA.

v LOCOMOTIVE VALVE-G EAR.

SPECIFICATION forming part of Letters Patent No. 621,828, dated March 28, 1899.

7 Application filed November 25, 1898- Serial No. 697,408. (No model.)

To all whom it may concern.-

Be it known that I, LINCOLN A. LANG, of Yule, Billings county, North Dakota, have invented certain new and useful Improvements in Locomotive Valve-Gears, (Case C,) of which the following is a specification.

This invention pertains tolocomotive valvegears, and the improvement will be readily understood from the following description, taken in connection with the accompanying drawings, in which- Figure 1 is a plan of the improved valvegear, one of the eccentric-straps appearing in horizontal section; Fig 2, a side elevation of the same, the axle appearing in vertical section; Fig. 3, a vertical section ofapair of the eccentrics and one of the straps in the plane of the axis of the axle; Fig. 4, a side elevation of a single eccentric of modified form; and Fig. 5, a front elevation, part vertical section, of the latter.

In the drawings, 1 indicates the locomotiveframe; 2, the pedestal-boxes sliding vertically therein; 3, the axle, journaled in the pedestal-boxes; 4, the eccentrics on the axle; 5, the eccentric-straps; 6, the springs c011- nected with the frame and pedestal-boxes to enable the axle to elasticallysupportthe load carried by the frame; 7, the blades; 8, the valve-rockers, mounted in bearingsrigidly attached to the frame, with their axes normally parallel with the axis of axle 3; 9, the valve-rods; 10, thelinks, engaging the valverockers and coupled to their appropriate blades; 11, the reversing-shaft, disposed parallel to the common axis of the valve-rockers andjournaled in bearings rigidly attached to the frame; 12, the reversing-rod; 13, the suspenders; 14, the faces of the eccentrics, the same being segmental in cross-section and representing segments of spheres struck from 'the centers of the eccentrics; 15, a circumferential rib projecting from the periphery of each eccentric, the periphery of the rib being segmental in cross-section and representing a segment of a sphere concentric with but larger than the sphere represented by the face of the eccentric, and 16 a circumferential groove formed within the bore of each eccentric strap, the groove engaging the rib 15 of the eccentric encircled by the strap, the

groove being widerthan the rib and the circumferential wall of the groove being of segmental cross-section to fit the peripheryof the rib.

Either pedestal-box 2 is at liberty to rise and fall with reference to the frame, so that the axle is at liberty within limits to take up angular positions with reference to the horizontal planes of the axes of the valve-rockers, the reversing-shaft, and all the pivots of the links. This change of angular relationship is constantly taking place as the locomotive runs over the track. As the change of angular relationship referred to takes place the ec- 6 centric-straps swivel upon the eccentrics upon horizontal axes, cutting the eccentric centers of the eccentrics, the eccentric-straps thus maintaining themselves in vertical planes at right angles to the horizontal planes of the axes of the valve-rockers, reversing-shaft, and the various pivots of the links. Ribs 15, being narrower than the grooves 16 in the straps, permit of the swiveling motion referred to. Lubricant applied at the central upper portions of the straps finds its way into grooves 16 at each side of the ribs 15, the grooves thus forming recesses to contain the lubricant. As the-locomotive runs over the track the ribs are constantly oscillating from side to side in So the grooves upon horizontal axes, the ribs thus servingas oscillating pistons, so to speak, tending to force the lubricant sidewise over the side portions of the bearing-faces of the eccentrics. 5

There two eccentrics are employed for each link, as shown, the eccentrics may be secured to the axle in any usual manner; but if a single eccentric only be employed for each linkas, for instance, in United States Patent No. 607,058, of July 12, 1898the eccentrics may be formed as seen in Figs. 4E and 5, in which hubs 17 project from each side of the eccentric and are provided With ears 18, through which pass clamping-bolts 19, the eccentric 5 being parted in the axial line of the bore of the eccentric and the bolts serving to unitethe two parts of the eccentric and clamp them to the axle.

I claim as my invention- 7 In locomotive valve-gears, the combination, substantially as set forth, of a frame, pedestalboxes movable therein, an axle journaled in having a width greater than the thickness of IO said pedestal-boxes, an eccentric on said axle said rib, whereby said rib may act as an osand having a peripheral bearing-surface segeillatlng piston Within said groove, for thcpurmental in cross-section, a circumferential rib pose set forth. 7

5 projectingfronlsaid bearing-surfaceandhav- LIN OIN A TAN ing its outer surface segmental in cross-scc- C J tion, and a strap engaging the bearing-sur- \Vitnesses: face of said eccentric and having an internal M. F. GALLAGHER,

groove fitting the outer surface of said rib and v E. V. GRIEVISH. 

